CN109358155B - Process for detecting heavy metal components in wastewater to be treated - Google Patents
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Abstract
The invention discloses a process for detecting heavy metal components in wastewater to be treated, which belongs to the field of hydrometallurgy, and comprises the steps of firstly taking 10ml of wastewater from the wastewater to be treated into a beaker A for standby, then taking 10ml of egg white into a beaker B for standby, taking 2ml of egg white from the beaker B to be added into the beaker A, realizing the effect of judging whether the wastewater to be treated contains heavy metals or not by common egg white in daily life, greatly reducing the detection cost by using the egg white compared with the detection of whether the wastewater contains the heavy metals or not by using a chemical reagent, simultaneously judging whether the wastewater contains the heavy metals or not in advance, avoiding useless work when the wastewater does not contain the heavy metals, invisibly improving the detection efficiency, rapidly and simply detecting whether the wastewater to be treated contains lead and mercury or not, thereby providing a direction for detecting the heavy metal content in the wastewater at the later stage, the efficiency of ingredient content appraisal in the laboratory of later stage is improved.
Description
Technical Field
The invention relates to the field of wet metallurgy, in particular to a process for detecting heavy metal components in wastewater to be treated.
Background
According to the different pollution levels, industrial wastewater can be divided into production wastewater and production sewage. The production wastewater refers to water (such as equipment cooling water) which is slightly polluted or has increased temperature in the use process; the production sewage is water which is seriously polluted in the using process, and most of the production sewage has serious harmfulness. The industrial waste water is classified into inorganic waste water mainly containing inorganic pollutants, organic waste water mainly containing organic pollutants, mixed waste water containing both organic matters and inorganic matters, heavy metal waste water, waste water containing radioactive substances, and cooling water polluted only by heat according to the chemical properties of main pollutants contained in the industrial waste water. For example, electroplating wastewater and wastewater from mineral processing are inorganic wastewater, and wastewater from food or petroleum processing is organic wastewater.
The general waste water that waits to handle need detect its composition, can confirm the processing scheme in later stage, contain heavy metal in the waste water that waits to handle then can not directly discharge, especially contain the waste water of heavy metal lead and mercury if directly discharge can cause serious environmental pollution, but carry out the general sample that needs of component detection time measuring, then detect composition and content in the laboratory, because general composition is unknown for do not have an unambiguous target when the laboratory detects, need the experiment many times, at this in-process, a large amount of time has been wasted, work efficiency has been reduced.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a process for detecting heavy metal components in wastewater to be treated, which can realize the effect of judging whether the wastewater to be treated contains heavy metals or not through common egg white in daily life.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A detection process for heavy metal components in wastewater to be treated comprises the following steps:
step one, sampling, namely taking 10ml of wastewater from the wastewater to be treated into a beaker A for later use;
step two, taking 10ml of egg white to a beaker B for later use;
step three, taking 2ml of egg white from the beaker B, adding the egg white into the beaker A while stirring, and standing for three minutes after 2ml of egg white is added;
separating the precipitate generated in the third step from the beaker A by a draining and separating mechanism, and standing for five minutes;
step five, repeating the step three and the step four until no precipitate is generated when the egg white is added into the beaker A;
step six, mixing the separated precipitates, and equally dividing into three parts;
seventhly, adding 5ml of tea water into the first precipitate, and recording the volume L1;
step eight, firstly adding hydrochloric acid into the second precipitate to generate precipitate, then separating the precipitate, then adding a KI-CuSO4-Na2SO3 solution, and if no precipitate is generated, directly adding a KI-CuSO4-Na2SO3 solution;
step nine, add 5ml distilled water to the third precipitate as a control.
Furthermore, the hydrochloric acid added in the step eight needs to be excessive, the excessive hydrochloric acid is used for identifying the mercurous ions, SO that the mercurous ions are all changed into Hg2Cl2 precipitate, meanwhile, the influence of the mercurous ions on the subsequent identification of the mercurous ions can be avoided, and the sum of the volumes of the added hydrochloric acid and the KI-CuSO4-Na2SO3 is 5ml, and can be kept consistent with the amount of the added solutions of the other two groups.
Furthermore, the test temperature in the second step and the third step is 25 ℃, the egg white is denatured at about 70 ℃ due to high temperature, the possibility that the egg white is denatured due to temperature to generate precipitate is eliminated, and the detection accuracy is improved.
Further, the draining and separating mechanism comprises a draining reaction frame and a positioning moving block, the draining reaction frame is placed at the bottom of the beaker A, an inverted U-shaped rod is fixedly connected to the upper end of the positioning moving block, a deformation straight-bending mechanism is fixedly connected to the upper end of the draining reaction frame, a mushroom-shaped groove is formed in the lower end of the positioning moving block and clamped with the deformation straight-bending mechanism, when the sediment is required to be separated, the positioning moving block is placed into the beaker A through the inverted U-shaped rod, the deformation straight-bending mechanism is clamped into the mushroom-shaped groove, the draining and separating mechanism is lifted upwards through the inverted U-shaped rod, the bottom surface of the draining reaction frame is higher than the liquid level, the draining and separating mechanism is taken out after five minutes to place the sediment into another beaker C, the draining reaction frame is pulled out downwards, the draining reaction frame is placed into the beaker A again, and the draining and separating mechanism can conveniently separate the sediment generated after the egg white is added, is convenient for observing whether the egg white is precipitated after being continuously added.
Furthermore, the bottom of the draining reaction frame is of a porous net structure, so that separation and draining of precipitates are facilitated.
Further, it includes two hemisphere head buckles to warp straight curved mechanism, and two hemisphere head buckle the inner all opens the chisel and have the cavity, the elastic deformation pole has been placed to the cavity inside, and two hemisphere head buckles are the equal fixedly connected with of one end that is close to each other adsorbs type hemisphere, two the equal fixedly connected with magnet in the inside of adsorption type hemisphere, the one end magnetic pole that two magnets are close to each other is opposite, and two magnets adsorb each other for hemisphere head buckle is in vertical state, and the straight curved mechanism card of convenient deformation advances the mushroom inslot.
Further, mushroom inslot top end fixedly connected with magnetism partition plate, magnetism partition plate is located between two hemisphere head buckles, the magnetic pole at magnetism partition plate both ends is the same rather than the magnetic pole of the absorption type hemisphere interior magnet that is close to respectively, when warping straight curved mechanism card advance mushroom inslot, magnetism partition plate can inject between two absorption type hemispheres, because its both ends magnetic pole is the same with the absorption type hemisphere interior magnet that is close to, like poles repel each other for two absorption type hemispheres part from each other, hemisphere head buckle loses the adsorption affinity of magnet, make elastic deformation pole reconversion, then hemisphere head buckle bending card along with it just blocks at mushroom inslot.
Furthermore, the elastic deformation pole original state is L shape, and the elastic deformation pole mainly is made by thermoplastic polyurethane elastomer rubber, and under the adsorption of the interior magnet of absorption type hemisphere, the elastic deformation pole becomes vertical state, and after losing the adsorption of magnet, the elastic deformation pole can the reconversion, just blocks in the mushroom-shaped inslot.
Further, the equal fixedly connected with magnetism locating piece of one end that location movable block and the pole of falling the U-shaped are close to each other, two the magnetism locating piece contacts with beaker A's inside and outside wall respectively, the inside neodymium iron boron that has placed of magnetism locating piece, neodymium iron boron have excellent magnetism, and two magnetism locating pieces can separate beaker A's cup wall and adsorb each other together for driping separating mechanism can stop at will in the position that needs stopped, conveniently driping the sediment.
Furthermore, the material of magnetism locating piece, hemisphere head buckle and absorption type hemisphere is silicon rubber, and silicon rubber chemical property is stable, is difficult for being corroded by pending waste water, and silicon rubber has elasticity simultaneously, protects its inside structure difficult quilt to be damaged.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) this scheme can realize judging the effect whether to contain the heavy metal in the pending waste water through common egg white among the daily life, compare in detecting whether to contain the heavy metal with chemical reagent, can reduce the detection cost by a wide margin with egg white, judge whether to contain the heavy metal simultaneously in advance, also can avoid doing useless work when not containing the heavy metal in the waste water, promote detection efficiency in the intangible, and whether contain the effect of lead and mercury in the detection pending waste water that can be quick simple, thereby provide a direction for heavy metal content in the later stage detection waste water, improve the efficiency of composition content appraisal in the later stage laboratory.
(2) And step eight, adding excessive hydrochloric acid which is used for identifying the mercurous ions SO that the mercurous ions are changed into Hg2Cl2 precipitate, simultaneously avoiding the influence of the mercurous ions on the subsequent identification of the mercurous ions, wherein the sum of the volumes of the added hydrochloric acid and the KI-CuSO4-Na2SO3 is 5ml, and the solution amount can be kept consistent with that of the other two groups.
(3) The test temperature in the second step and the third step is 25 ℃, the egg white is denatured at about 70 ℃ due to high temperature, the possibility that the egg white is denatured due to temperature to generate precipitates is eliminated, and the detection accuracy is improved.
(4) The draining and separating mechanism comprises a draining reaction frame and a positioning moving block, the draining reaction frame is placed at the bottom of a beaker A, an inverted U-shaped rod is fixedly connected at the upper end of the positioning moving block, a deformation straight-bending mechanism is fixedly connected at the upper end of the draining reaction frame, a mushroom-shaped groove is formed in the lower end of the positioning moving block and is clamped with the deformation straight-bending mechanism, when the sediment is required to be separated, the positioning moving block is firstly placed into the beaker A through the inverted U-shaped rod, the deformation straight-bending mechanism is clamped into the mushroom-shaped groove, then the draining and separating mechanism is lifted upwards through the inverted U-shaped rod, the bottom surface of the draining reaction frame is higher than the liquid level, the draining and separating mechanism is taken out after five minutes, the sediment is placed into another beaker C, the draining reaction frame is pulled downwards and placed into the beaker A again, and can conveniently separate the sediment generated after egg white is added, is convenient for observing whether the egg white is precipitated after being continuously added.
(5) The bottom of the draining reaction frame is of a porous net structure, so that the separation and the draining of the sediment are facilitated.
(6) Warp straight curved mechanism and include two hemisphere head buckles, and two hemisphere head buckles are the inner all opens the chisel and have the cavity, and the inside elastic deformation pole of having placed of cavity, the equal fixedly connected with absorption type hemisphere of one end that two hemisphere head buckles are close to each other, the inside equal fixedly connected with magnet of two absorption type hemispheres, and the one end magnetic pole that two magnets are close to each other is opposite, and two magnets adsorb each other for hemisphere head buckle is in vertical state, and the convenient straight curved mechanism card that warp advances the mushroom inslot.
(7) Mushroom inslot top end fixedly connected with magnetism partition plate, magnetism partition plate is located between two hemisphere head buckles, the magnetic pole at magnetism partition plate both ends is the same rather than the magnetic pole of the adsorption type hemisphere interior magnet that is close to respectively, when the straight curved mechanism card that warp advances the mushroom inslot, magnetism partition plate can inject between two adsorption type hemispheres, because its both ends magnetic pole is the same with the adsorption type hemisphere interior magnet that is close to, like poles repel each other, make two adsorption type hemispheres part from each other, hemisphere head buckle loses the adsorption affinity of magnet, make elastic deformation pole reconversion, then hemisphere head buckle is crooked thereupon just to block at the mushroom inslot.
(8) The elastic deformation pole original state is L shape, and the elastic deformation pole is mainly made by thermoplastic polyurethane elastomer rubber, and under the adsorption of the interior magnet of absorption type hemisphere, the elastic deformation pole becomes vertical state, and after the adsorption that loses magnet, the elastic deformation pole can the reconversion, just blocks in the mushroom-shaped inslot.
(9) The equal fixedly connected with magnetism locating piece of one end that location movable block and the pole of falling the U-shaped are close to each other, and two magnetism locating pieces contact with beaker A's inside and outside wall respectively, and the inside neodymium iron boron that has placed of magnetism locating piece, neodymium iron boron have excellent magnetism, and two magnetism locating pieces can separate beaker A's cup wall and adsorb each other together for driping separating mechanism can stop at will in the position that needs stopped, makes things convenient for the driping to deposit.
(10) The material of magnetism locating piece, hemisphere head buckle and absorption type hemisphere is silicon rubber, and silicon rubber chemical property is stable, is difficult for being corroded by pending waste water, and silicon rubber has elasticity simultaneously, protects its inside structure difficult quilt to be damaged.
Drawings
FIG. 1 is a principal flow diagram of the present invention;
FIG. 2 is a schematic view of the drain separator mechanism of the present invention in a beaker A;
FIG. 3 is a schematic view of the bottom surface of the draining and separating mechanism of the present invention when it is separated from the liquid surface;
FIG. 4 is a schematic structural diagram of a draining reaction block according to the present invention;
FIG. 5 is a schematic view of the structure at A in FIG. 4;
fig. 6 is a schematic structural view of the draining reaction frame of the present invention.
The reference numbers in the figures illustrate:
the device comprises a draining reaction frame 1, an inverted U-shaped rod 2, a magnetic positioning block 3, an elastic deformation rod 4, a positioning moving block 5, a magnetic partition plate 6, a hemispherical head fastener 7, an adsorption hemisphere 8 and a mushroom-shaped groove 9.
Detailed Description
The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a process for detecting heavy metal components in wastewater to be treated includes the following steps:
step one, sampling, namely taking 10ml of wastewater from the wastewater to be treated into a beaker A for later use;
step two, taking 10ml of egg white to a beaker B for later use;
step three, taking 2ml of egg white from the beaker B, adding the egg white into the beaker A while stirring, standing for three minutes after 2ml of the egg white is added, wherein the egg white is denatured to generate precipitate when the treated waste liquid contains heavy metal salt, and the egg white is not denatured to generate precipitate when the treated waste liquid does not contain heavy metal salt;
separating the precipitate generated in the third step from the beaker A through a draining and separating mechanism, and standing for five minutes to fully drain the solution on the precipitate;
step five, repeating the step three and the step four until no precipitate is generated when the egg white is added into the beaker A, so that all heavy metals in the sample react with the egg white;
step six, mixing the separated precipitates, and equally dividing into three parts;
seventhly, adding 5ml of tea water into the first precipitate, recording the volume L1, wherein tannic acid in the tea can form a soluble compound with lead, and when the precipitate is observed to be obviously reduced or the volume L1 is reduced, the waste liquid to be treated contains heavy metal lead;
step eight, firstly adding hydrochloric acid into the second precipitate, dissolving to generate precipitate, wherein the precipitate contains mercurous ions, separating the precipitate, then adding KI-CuSO4-Na2SO3 solution, not generating precipitate, and if the precipitate does not contain mercurous ions, directly adding KI-CuSO4-Na2SO3 solution, adding KI-CuSO4-Na2SO3 solution to generate orange precipitate, wherein the precipitate contains mercury ions, and if the precipitate does not generate orange precipitate, the precipitate does not contain mercury ions
Step nine, adding 5ml of distilled water into the third part of sediment as a comparison group, wherein the sediment is not obviously changed by adding the distilled water, compared with the other two groups, the draining sediment does not contain soluble substances, the change of the sediment in the seventh step and the eighth step is independent of water, can realize the effect of judging whether the wastewater to be treated contains heavy metals or not through common egg white in daily life, can greatly reduce the detection cost by using the egg white compared with the method for detecting whether the wastewater to be treated contains the heavy metals or not by using a chemical reagent, meanwhile, whether the wastewater contains heavy metals or not is judged in advance, useless work can be avoided when the wastewater does not contain the heavy metals, the detection efficiency is invisibly improved, the effect of quickly and simply detecting whether the wastewater to be treated contains lead and mercury or not can be realized, thereby providing a direction for later stage detection of heavy metal content in the wastewater and improving the efficiency of component content identification in a later stage laboratory.
The hydrochloric acid added in the step eight needs to be excessive, the excessive hydrochloric acid is used for identifying mercurous ions, SO that the mercurous ions are changed into Hg2Cl2 precipitate, meanwhile, the influence of the mercurous ions on the subsequent identification of the mercurous ions can be avoided, the sum of the volumes of the added hydrochloric acid and KI-CuSO4-Na2SO3 is 5ml, the sum can be kept consistent with the amount of the added solutions of the other two groups, the test temperature of the step two and the step three is 25 ℃, egg white is denatured at about 70 ℃ due to high temperature, the possibility that the egg white is denatured due to temperature to generate precipitate is eliminated, and the detection accuracy is improved.
Referring to fig. 2-4, the draining and separating mechanism includes a draining reaction frame 1 and a positioning moving block 5, the bottom of the draining reaction frame 1 is a porous net structure for facilitating separation and draining precipitation, the draining reaction frame 1 is placed at the bottom of a beaker a, an inverted U-shaped rod 2 is fixedly connected to the upper end of the positioning moving block 5, magnetic positioning blocks 3 are fixedly connected to the ends of the positioning moving block 5 and the inverted U-shaped rod 2 close to each other, the two magnetic positioning blocks 3 are respectively contacted with the inner and outer walls of the beaker a, neodymium iron boron is placed inside the magnetic positioning blocks 3, the neodymium iron boron has excellent magnetism, the two magnetic positioning blocks 3 can be mutually adsorbed together through the cup wall of the beaker a, so that the draining and separating mechanism can be randomly stopped at a position to be stopped, draining precipitation is facilitated, a deformation straight bending mechanism is fixedly connected to the upper end of the draining reaction frame 1, a mushroom-shaped groove 9 is drilled at, the mushroom-shaped groove 9 is clamped with the deformation straight-bending mechanism, when sediment needs to be separated, the positioning moving block 5 is firstly placed into the beaker A through the inverted-U-shaped rod 2, the deformation straight-bending mechanism is clamped into the mushroom-shaped groove 9, then the draining and separating mechanism is lifted upwards through the inverted-U-shaped rod 2, the bottom surface of the draining reaction frame 1 is higher than the liquid level, the draining and separating mechanism is taken out after five minutes to place the sediment into another beaker C, the draining and separating mechanism is pulled out downwards to place the draining reaction frame 1 into the beaker A again, the draining and separating mechanism can conveniently separate the sediment generated after egg white is added, and whether the sediment is generated after the egg white is continuously added or not can be observed conveniently.
Please refer to fig. 5, the straight curved mechanism of warping includes two hemisphere head buckles 7, two hemisphere head buckle 7 the inner all opens chisel and has the cavity, elastic deformation pole 4 has been placed to the cavity inside, the equal fixedly connected with of one end absorption type hemisphere 8 that two hemisphere head buckles 7 are close to each other, the equal fixedly connected with magnet in two absorption type hemisphere 8 insides, the one end magnetic pole that two magnets are close to each other is opposite, two magnets adsorb each other, make hemisphere head buckle 7 be in vertical state, the straight curved mechanism card of convenient warping enters mushroom-shaped groove 9, magnetism locating piece 3, hemisphere head buckle 7 and absorption type hemisphere 8's material are silicon rubber, silicon rubber chemical property is stable, be difficult for being corroded by pending waste water, silicon rubber has elasticity simultaneously, protect its inside structure difficult quilt to be damaged.
Referring to fig. 6, a magnetic partition plate 6 is fixedly connected to the top end of the mushroom-shaped groove 9, the magnetic partition plate 6 is located between two hemispherical head fasteners 7, the magnetic poles at the two ends of the magnetic partition plate 6 are respectively the same as the magnetic poles of the magnets in the adjacent adsorption-type hemispheres 8, when the deforming straight-bending mechanism is clamped in the mushroom-shaped groove 9, the magnetic partition plate 6 is inserted between the two adsorption-type hemispheres 8, because the magnetic poles at the two ends are the same as the magnets in the adjacent adsorption-type hemispheres 8, and the magnetic poles repel each other in the same polarity, the two adsorption-type hemispheres 8 are separated from each other, the hemispherical head fasteners 7 lose the adsorption force of the magnets, so that the elastically deformable rod 4 is restored to its original state, the elastically deformable rod 4 is L-shaped, and the elastically deformable rod 4 is mainly made of thermoplastic polyurethane elastomer rubber, under the adsorption action of the magnets in the adsorption-type hemispheres 8, the elastically, the elastic deformation rod 4 can be restored to the original shape, so that the hemispherical head buckle 7 is bent along with the elastic deformation rod and just clamped in the mushroom-shaped groove 9.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.
Claims (6)
1. A detection process for heavy metal components in wastewater to be treated is characterized by comprising the following steps: the method comprises the following steps:
step one, sampling, namely taking 10ml of wastewater from the wastewater to be treated into a beaker A for later use;
step two, taking 10ml of egg white to a beaker B for later use;
step three, taking 2ml of egg white from the beaker B, adding the egg white into the beaker A while stirring, and standing for three minutes after 2ml of egg white is added;
separating the sediment generated in the third step from the beaker A through a draining and separating mechanism, standing for five minutes, wherein the draining and separating mechanism comprises a draining reaction frame (1) and a positioning moving block (5), the draining reaction frame (1) is placed at the bottom of the beaker A, an elastic deformation rod (4) is clamped at the inner end of the positioning moving block (5), an inverted U-shaped rod (2) is fixedly connected at the upper end of the positioning moving block (5), a deformation straight-bending mechanism is fixedly connected at the upper end of the draining reaction frame (1), a mushroom-shaped groove (9) is formed at the lower end of the positioning moving block (5), the mushroom-shaped groove (9) is clamped with the deformation straight-bending mechanism, the deformation straight-bending mechanism comprises two hemispherical head buckles (7), a cavity is formed in each of the inner ends of the two hemispherical head buckles (7), and the elastic deformation rod (4) is placed in the cavity, the magnetic positioning block comprises two hemispherical head buckles (7), wherein one ends, close to each other, of the two hemispherical head buckles (7) are fixedly connected with adsorption type hemispheres (8), magnets are fixedly connected inside the two adsorption type hemispheres (8), magnetic poles of the two ends, close to each other, of the magnets are opposite, a magnetic partition plate (6) is fixedly connected to the top end in a mushroom-shaped groove (9), the magnetic partition plate (6) is located between the two hemispherical head buckles (7), the magnetic poles of the two ends of the magnetic partition plate (6) are respectively the same as those of the magnets in the adsorption type hemispheres (8) close to the magnetic partition plate, magnetic positioning blocks (3) are fixedly connected to one ends, close to each other, of a positioning moving block (5) and an inverted U-shaped rod (2), the two magnetic positioning blocks (3) are respectively contacted with the inner wall and the outer wall;
step five, repeating the step three and the step four until no precipitate is generated when the egg white is added into the beaker A;
step six, mixing the separated precipitates, and equally dividing into three parts;
seventhly, adding 5ml of tea water into the first precipitate, and recording the volume L1;
step eight, adding hydrochloric acid into the second precipitate, and then adding a KI-CuSO4-Na2SO3 solution;
step nine, add 5ml distilled water to the third precipitate as a control.
2. The detection process for heavy metal components in wastewater to be treated according to claim 1, which is characterized in that: the hydrochloric acid added in the step eight needs to be excessive, and the sum of the volumes of the added hydrochloric acid and KI-CuSO4-Na2SO3 is 5 ml.
3. The detection process for heavy metal components in wastewater to be treated according to claim 1, which is characterized in that: and the test temperature of the second step and the third step is 25 ℃.
4. The detection process for heavy metal components in wastewater to be treated according to claim 1, which is characterized in that: the bottom of the draining reaction frame (1) is of a porous net structure.
5. The detection process for heavy metal components in wastewater to be treated according to claim 1, which is characterized in that: the elastic deformation rod (4) is L-shaped in the original state, and the elastic deformation rod (4) is mainly made of thermoplastic polyurethane elastomer rubber.
6. The detection process for heavy metal components in wastewater to be treated according to claim 1, which is characterized in that: the magnetic positioning block (3), the hemispherical head buckle (7) and the adsorption type hemisphere (8) are all made of silicon rubber.
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